Roll ramming apparatus.



H. P. MACDONALD.

ROLL RAMMING APPARATUS.

APPLICATION FILED JUNE 28,1913.

LWGfiS. Patented 00t.28,1913.

INVENTOR COLUI\\XHI PLANOGRAPH co. WASHINGTON. I), c.

ennui) sTArns v PATENT OFFICE.

nirnnvrrnnononnnn, or numerals; sense Ass-remit To me snnnn nee. Inon wonn's, or JnRsnYorrY, new JERSEY, A seamen-Tron or new messy.

ROLL miner-mo APPARATUS;

Specification of Letters Patent;

Patented Oct. as, rare.

Application filed June 285 19-13: Serial-Nm-WWSOQ:

1 b all whom it may concern:

Be it known that I, HARRY P. Mieonon- Anm a; citizen of the United States; residing at hl ontclair, in the county of Essex and State of New Jersey, haveintentedcertain new and useful Improvements in Rolhltammingllepparatus, of Which the following is a specification.

This invention relatesto roll ramming, apparatus and has reference primarily to the provision of improved control means for actuating the mechanism operating the roll.

A; further object of the invention resides in the provision of novel and improved means whereby it is impossible to actuate thernmmingroll until a ll'parts are in open ative position,

My invention also contemplates the: provision of means whereby the control mechanisnr is automatically made inoperative when the tracks for supporting the roll are movedto inoperative position and whereby it is made impossible to move one of the tracks to inoperative positioir Without also movin i the other track to such position.

The foregoing, together With such other objects as may hereina li't'er appear or are in-; cident to my invention I attain by meansof a. construction which 1 have illustrated in preferred form in the accompanying; draW-' ings Wherein:

Figure I is a plan view of a roll ramming machine, partially broken away shewingmy' improved apparatus; Fig. 2 is a partial side elevation and section of Figure 1; and Fig. 3' is' a sectional view showing a detail of the invention.

This invention is primarilydesigned iior use" in connection with roll ramming apple; ratus; The general construction of the rollf ramming mechanism proper is of'the usual type and is illustrated diagrammatically in the drawings; in brief, the apparatuscolnprises afr'ame 7 adapted to: contain any suit-: able form of pattern drawing mechanism above'which is sup-ported the usual flash: 8. Hinged to the frame 7 bymeans of hinge members 9 are tracks 10 and 10 which, when movedto operative position, rest upon? the top face of the flask and when moved to inoperative positiong lie to the side of the frame '2" clearof the flask, so that thelatter can be readily removed; The ramming r011 11* is mounted in framework 12 and is proa iidedvvith grooves or gutters 13at eachend into which the vertical legs of the tracks 1 0 and 10 extend. By this construction, when the ramming"- roll is advanced or retracted, the tracks 10 and 1 0 are prevented from spreading apart; Adj'acent the inner end of the frame? is a second framework 14 which is provided with tracks 10 with which tracks 10 and 10 ailine when the latter are moved to operative position. 'llhe ramming roll 11 issn-p'portcd on the tracks 10 when in inoperative position:

Retei-ringnow to those features olimy i 11- v-ontion which depart tronr the usual construction it will be seen that the ramming roll: is ope 'ated by means of a rjacli 1 5 which is secured to the framework 12 and is engaged by a pinion 16 mounted on the main driving shaft 17, such shaft being turned by means" ofmotor 18 through interposed reduction gearing, the casing of which indicated by the numeral 19*. The motor is controlle d by a controller 20 of any pre- 'ferr'ed type; thereversar o'li tjherammiug roll being preferably accomplished by reversing the" directioir oi? the current in the motor. In operation it isdesirable to have the ramming roll automatically reversed when it reachesextreme forwvard position, and return it to initial position This reversal is accoi'nplishod by means of an automatic re- .versingniechanismQl which is of the same jgei'ieralconstruction as that illustrated and described in my issued application No. 1360;8498; dated May G,- 1913. The controller is manually operated by means of the ihandlever22 which is mounted for reciproicativemovementin brackets 23 and 24- carsried by the 'fnmework l l. The handle is 2 provided with a rack portion 25 Which e11- gages a gear segment QGmounted on the controller shaft" andit will be apparent that I reciproc-ative movement of the handle 22 imparts a rotary movement to the controller I shaft through the" medium of the gear 26 l and raclr It is advantageous to automatically lock the lever 22 and thereby prevent accidental actuation ofthe controller to advance the roll when the tracks 10 are not in proper operative position aud to this end I provide the followingmechanism.

' Pivotally mounted on the framework 14 :is an oscillating" lcver 27, the pivotal point of support for such lever being so located that the' inner end of said lever normally -tends to move downward: Secured to the forward end of the lever 27 is a pin 28 which lies beneath the track 10 when the latter is in operative position, the end of said p111 being engaged by the track, the weight of which serves to depress the forward end of the lever 27. At the rear end the lever 27 is connected by means of the link 29 to a transversely extending rocking lever 30 fulcrumed on the framework 14 as at 31. Secured to the free end of the lever 30 is a vertically extending bracket plate 32 which is adapted to abut against the bracket 24 and serve as a stop for preventing rearward movement of the handle 22. The bracket 32 and the lever 30 are shown in side elevation in Fig. 3. It will be clear that when the track 10 is moved to operative position and depresses the forward end of the lever 27, the rearward end will be elevated, which will cause the rocking lever 30 to depress the plate 32 so that the latter will lie clear of the handle 22. The handle can then be moved to actuate the controller. Then the track 10 is swung to inoperative position clear of the flask, the rear end of the lever 27 will fall by the action of gravity as previously pointed out and the rocking lever 30 will elevate the bracket 32 into position indicated in dotted lines in Fig. 2, at which time rearward movement of the handle 22 is automatically prevented. From the foregoing it will be apparent that it is impossible to shift the controller unless the track 10 is in proper operative position, the accidental actuation of the ramming roll being thus prevented and the liability of injury to the mold parts obviated.

The track 10 is provided at its forward end with an operating handle 33 by means of which the track can be readily swung into and out of operative position and the track 10 is provided with a similar operating handle 34:. In order to prevent the operator from moving the tracklO to inoperative position while the track 10 is still in operative position, the handle 3% is so arranged as to project beneath the track 10. By this construction, it is impossible to raise the handle 34 until the track 10 has first been moved to inoperative position and the handie 22 automatically locked. The construction is simple, the parts may be readily operated and the liability of accidental operation of the ramming roll and consequent injury to the apparatus is reduced to a minimum.

What I claim is:

1. In roll ramming apparatus the combination of a flask, a roll for ramming the sand in the flask, a movable track for supporting the roll above the flask when in operative position and lying free of the flask when in inoperative position, power mecha nism for operating the roll, a control for the power mechanism, and means for locking the control automatically releasing when the track is moved to operative position.

2. In roll ramming apparatus the combination of a flask, a roll for ramming the sand in the flask, a movable track for supporting the roll above the flask when in operative position and lying free of the flask when in inoperative position, power mechanism for operating the roll, a control for the power mechanism, and means automatioally moving to lock the control when the track is moved to inoperative position.

3. In roll ramming apparatus the combination of a flask, a roll for ramming the sand in the flask, a movable track for supporting the roll above the flask when in operative position and lying free of the flask when in inoperative position, and looking means for the roll automatically releasing when the track is moved to operative position.

4. In roll ramming apparatus the combination of a flask, a ramming roll, a support for the roll movable into and out of position over the flask, a platform adjacent the flask adapted to support the roll in inoperative position, and means preventing movement of the roll from off the platform, said means automatically releasing when the support 1i ls ilnoved into operative position over the as i.

5. In roll ramming apparatus a flask, a roll adapted to ram the sand in the flask, a pair of independently movable tracks for supporting the roll over the flask, and means whereby one of the tracks cannot be moved out of operative position when the other track is in operative position.

6. In roll ramming apparatus a flask, a roll adapted to ram the sand in the flask, a pair of independently movable tracks for supporting the roll over the flask, means whereby the first track cannot be moved out of operative position when the second track is in operative position, and locking means for preventing movement of the roll automatically actuated when the second track is moved out of operative position.

7. In roll ramming apparatus a flask, a roll adapted to ram the sand in the flask, a pair of independently movable tracks for supporting the roll over the flask, and a handle for moving one of the tracks, said handle extending beneath the other track so that the latter must first be moved to inoperative position before the former can be moved to such position.

8. In roll ramming apparatus the combination of a flask, a ramming roll, a movable track adapted when moved to operative position to support the roll over the flask, power means for operating the flask, a control for said power means, a rocking lever and means carried on one end of said lever for locking the control, the other end of said lever being engaged by the track when the latter is moved to operative position.

9. In roll ramming apparatus the combination of a flask, a ramming roll, a movable track adapted when moved to operative position to support the roll over the flask, a platform adjacent the flask for supporting the roll when the latter is in inoperative position, power means for operating the roll. a controller for said means, an operating handle for the controller, a lever pivoted in termediate its ends to the platform, and a locking device carried on one end of said lever and engaging the said hand1e,the other end of said lever being engaged and depressed by the track when the latter is moved to operative position.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

HARRY P. MACDONALD.

Witnesses:

J. ARNOLD, C. G. GREENLEE.

t'lopies of this patent maybe obtained for five cents each. by addressing the Commissioner of Patents, Washington, D. C. 

